SCOTT—COLEOPTERA; HYDROPHILIDA, HISTERIDAI 228 
The following table shows the distribution of the species so far as known: 

Before the names of the species : Distribution among the groups of | 
* indicates that the species is new to science, islands visited by the Expedition 
+ indicates that the species is recorded from | —— Sa ~ External Distribution 
these islands for the first time, but not | Seychelles | Cargados Providence 
new to science. Group Group | (Farquhar Gr.) | 


24. Platysoma tenuimargo ...... -— | 
25. Platysoma richteri............ a ngacoome || ial aeaaetee Madagascar 
26.  Carcinops 14-striata ......... Sey ain csscceeay lei c cmieee Subcosmopolitan (?) 
27.  Paromalus alluaudi ......... —— 
28. *Paromalus gardineri ......... —— 
29. *Paromalus calciger............ — 
30.  Bacanius ambiguus ......... 
31. Bacanius inopinatus ......... — 
32. +Bacanius atomarius ......... aE riences Wh tal yare Hawaiian Islands 
33. Acritus (Halacritus)algarum | ——, | ...... | ws... Ceylon ;_ Perim (Red Sea) 
34, * Acritus (Afletes) daubani ... 
35. *Acritus (A#letes) davidsoni — 
36. *Acritus (Ailetes) fryeri...... waaa 
SP Saprinus) erichsomierseee een |i =| eect | cesar Madagascar 
38. jSaprinus disjunctus ......... | ...... ee ee Madagascar 
39. Saprinus apricarius ......... —— | sees — Warmer regions of Old World 







It will be seen that no Histerid was collected by the Expedition in the Chagos 
or Amirantes groups, nor was any found by Mr Fryer during his 4 months’ stay in 
Aldabra or his visits to the neighbouring islands: nor have any species ever been recorded 
from these groups. 
The table shows that 15 species have been found in the Seychelles, 14 of them 
only in that archipelago, and 1 widely-distributed species both in that archipelago and 
also in the coral-island of Providence: while the remaining 1 species (Saprimus 
disjunctus) was found only in the coral-islands of the Cargados Carajos group. 
Of the 15 species found in the Seychelles, 9 are known only from those islands, 
and most of these are probably endemic. Of these 9 species, Platysoma tenwimargo 
has been stated to be closely allied to a New Guinea species (see p. 224): Paromalus 
alluaudi is said to be closely allied to an Eastern species (see p. 225): Paromalus 
gardinert (very possibly not endemic) in some ways resembles a Ceylon species. 
Nothing can be said about the affinities of Paromalus calciger, the two species of 
Bacanius, and the three species belonging to the subgenus diletes of Acritus. As 
stated on p. 230, it appears that no member of the whole great genus Acritus is 
known from Africa, and only two species from Madagascar; and until such minute 
creatures as Bacanius and Acritus are more collected and known, it is almost idle 
to speculate about the Seychelles species. 
Of the 6 species found in the Seychelles but known also from elsewhere, two 
(Platysoma richteri, Saprinus erichsoni) are Madagascar species: one (Bacanius ato- 
marius) is known from the Hawaiian Islands: one (Acritus algarum, a coast species) 
from Ceylon and Perim Island: while two are very wide-spread (Carcinops 14-striata 
and Saprinus apricarvus, the latter of which was also found in Providence). 
The one species, Saprinus disjunctus, found in the Cargados group is a Madagascar 
species. 
29—2 
